The Ager Romanus (literally, "the field of Rome"') is the geographical rural area (part plains, part hilly) that surrounds the city of

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

. Politically and historically, it has represented the area of influence of Rome's municipal government. It is limited to the south by the

Monti Prenestini The Monti Prenestini is a mountain range in the Lazio sub- Apennines, in central Italy to the east of Rome. It is of limestone formation. It is bounded by the Monti Tiburtini to the north, by the Monti Ruffi to the east, and by the valley of t ...

range, Alban hills and

Pontine Marshes 250px, Lake Fogliano, a coastal lagoon in the Pontine Plain The Pontine Marshes (, also ; it, Agro Pontino , formerly also ''Paludi Pontine''; la, Pomptinus Ager by Titus Livius, ''Pomptina Palus'' (singular) and ''Pomptinae Paludes'' (plu ...

; to the west by the

Tyrrhenian Sea The Tyrrhenian Sea (; it, Mar Tirreno , french: Mer Tyrrhénienne , sc, Mare Tirrenu, co, Mari Tirrenu, scn, Mari Tirrenu, nap, Mare Tirreno) is part of the Mediterranean Sea off the western coast of Italy. It is named for the Tyrrhenian pe ...

; to the north by the hills surrounding

Lake Bracciano Lake Bracciano ( it, Lago di Bracciano) is a lake of volcanic origin in the Italian region of Lazio, northwest of Rome. It is the second largest lake in the region (second only to Lake Bolsena) and one of the major lakes of Italy. It has a circu ...

and to the

east East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fac ...

by the Monti Tiburtini range.

History

Ancient Rome

The Rome of Romulus and his immediate successors possessed a very restricted territory, as did neighbouring

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

cities such as Praeneste. Such territories were marked by boundary stones, or

cippi A (plural: ''cippi''; "pointed pole") is a low, round or rectangular pedestal set up by the Ancient Romans for purposes such as a milestone or a boundary post. They were also used for somewhat differing purposes by the Etruscans and Carthaginians ...

, used to define and limit the legitimate area of influence of cities, and the boundaries of private landholdings. According to tradition, Rome rapidly outgrew the ''ager'' established by its founder, and rather than accept its confinement, Tullus Hostilius razed the Latin city of Alba Longa ca. 635 BC, and incorporated its former territories within the ''ager Romanus''. With the proclamation of the

Roman Republic The Roman Republic ( la, Res publica Romana ) was a form of government of Rome and the era of the classical Roman civilization when it was run through public representation of the Roman people. Beginning with the overthrow of the Roman Ki ...

in 509 BC, all the territory occupied by Romans in "

Latium vetus Old Latium ( la, Latium vetus or ') is a region of the Italian peninsula bounded to the north by the river Tiber, to the east by the central Apennine mountains, to the west by the Mediterranean Sea and to the south by Monte Circeo. It was the te ...

" came to be proclaimed

ager publicus The ''ager publicus'' (; "public land") is the Latin name for the public land of Ancient Rome. It was usually acquired via the means of expropriation from enemies of Rome. History In the earliest periods of Roman expansion in central Italy, th ...

, equivalent to state lands today, which were held by the state and could be granted to private citizens. The Roman municipal authorities of this era were the

consul Consul (abbrev. ''cos.''; Latin plural ''consules'') was the title of one of the two chief magistrates of the Roman Republic, and subsequently also an important title under the Roman Empire. The title was used in other European city-states throu ...

s. In effect, Rome was a gigantic city-territory continuously expanding across Europe.

Octavian Augustus Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian, was the first Roman emperor; he reigned from 27 BC until his death in AD 14. He is known for being the founder of the Roman Pr ...

founded the office of ''

praefectus urbi The ''praefectus urbanus'', also called ''praefectus urbi'' or urban prefect in English, was prefect of the city of Rome, and later also of Constantinople. The office originated under the Roman kings, continued during the Republic and Empire, an ...

'' and other offices which divided the administration of the city of Rome from that of the Roman Empire. Thus was solved the problem of delimiting the territory of the

municipium In ancient Rome, the Latin term (pl. ) referred to a town or city. Etymologically, the was a social contract among ("duty holders"), or citizens of the town. The duties () were a communal obligation assumed by the in exchange for the priv ...

of Rome from the territory of the rest of the empire - besides the ''Regio I Latii et Campaniae'' administered by a specific governor, the confines of the municipal authority of Rome came to be fixed at the "centesimum lapidem" (i.e. one hundred miles) on each of the via consularis converging on Rome. So, ''de iure'', the Roman municipal authority controlled the whole of

Lazio it, Laziale , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , demographics1_title2 ...

and part of Tuscany from

Talamone Talamone is a town in Tuscany, on the west coast of central Italy, administratively a frazione of the comune of Orbetello, province of Grosseto, in the Tuscan Maremma. Talamone is easily reached from Via Aurelia, and is about from Grosseto and ...

to Terracina and also parts of Abruzzo and

Umbria it, Umbro (man) it, Umbra (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , ...

. The same territorial division was confirmed by the re-subdivision of the provinces by Diocletian.

Medieval era

After the fall of the empire, the ''

'' continued to be elected and did not come to be totally deprived of their power even by the advancing papal power which effectively became the municipal government of Rome. The Ager Romanus, as a political zone subject to the municipium of Rome, theoretically continued to extend ''ad centesimum lapidem'', but in practice many of its regions ended up in Lombard hands, with still others managed by the religious authorities or the pope, who were beginning to manage their territories by means of '' patrimonia'' and '' domuscultae''.

Today

The ''motu proprio'' of 6 July 1817 by Pope Pius VII established the boundaries of the municipium of Rome, assigning to the capital its present communal territory as well as the present

commune A commune is an alternative term for an intentional community. Commune or comună or comune or other derivations may also refer to: Administrative-territorial entities * Commune (administrative division), a municipality or township ** Communes of ...

s of

Fiumicino Fiumicino () is a town and comune in the Metropolitan City of Rome, Lazio, central Italy, with a population of 80,500 (2019). It is known for being the site of Leonardo da Vinci–Fiumicino Airport, the busiest airport in Italy and the eleventh-bu ...

Pomezia Pomezia () is a municipality (''comune'') in the Metropolitan City of Rome Capital, Lazio, central Italy. In 2009 it had a population of about 60,000. History The town was built entirely new near the location of ancient Lavinium on land resulting ...

and Ardea. The confines of the Comunità di Roma were thus finally defined and no longer nebulous, and these limits ended at the constitution of the commune of Pomezia (also including present-day Ardea) following its lasting foundation during the "bonifica fascista" and—in the 1990s—of Fiumicino.

Sources

*''This page is a translation of its Italian equivalent.''

References

{{reflist, 2 History of Lazio Topography of the ancient city of Rome